Return null if all PermissionInfos are filtered

queryPermissionsByGroup should return the same result when the given
permission group isn't found or be filtered. The inconsistency gives
the chance to distinguish the difference.

Bug: 202386106
Test: atest PackageManagerTest
Change-Id: Ic7e4e77a7809f0620f6c121c84512f9434718250

parent e90adf37

services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -583,7 +583,7 @@ public class PermissionManagerServiceImpl implements PermissionManagerServiceInt
		final int callingUserId = UserHandle.getUserId(callingUid);
		out.removeIf(it -> mPackageManagerInt.filterAppAccess(it.packageName, callingUid,
		callingUserId));
		return out;
		return out.isEmpty() ? null : out;
		}

		@Override